Join Date: May 2003
Location: Tinton Falls, NJ
Replace the ignition module. It is a fairly common problem on the SCs, and the tach signal cutting in and out is a dead giveaway. The O2 sensor codes are all probably due to the misfires, which are probably caused by the failing DIS module. You may also have a TPS issue since the DIS module failing couldn't throw a TPS code. The MAF code might be related to the TPS, or it might be a vacuum leak or a dirty MAF. If it were my car, I would replace the DIS module and the TPS and then if there are still issues look for vacuum leaks. That is one thing about the SCs is that a little vacuum leak can cause all kinds of weird drivability problems, and they are a PITA to diagnose, but on the bright side they are usually very cheap to fix once you do find the problem.
-91 Cougar LS, coming soon, complete overhaul
with a 427" Windsor.
-90 XR7 5-speed black on black w/sunroof, MP2, coated rotors, double intercooler, 15%OD, ported heads, comp stage 1 cam, 85mm TB, 90MM LMAF, 80# injectors, and ported big valve heads
-98 Mark VIII LSC, Procharger P600b, TR3650 swap and 3.73s.
-90 SC Automatic rustbucket winter beater
-97 Tbird Sport 4.6 Nice weather daily driver
-"Your buddy Mike is INSANE!" -ClintD's dad